Printing-press cylinder



Jam.` 20, 1931. w. H. ANZETT PRNTING PRESS CYLINDER Filed April 5. 192s INVENTOR QUA/waan iban/Law I ATTORNEY A -Patented Jan.20, 1931 p winnaar n., aanZnfrfr,"orY BERGENFIELD, NWLJERSY; AssreNoRjTo AirrfRrcAn LrrHoGRArHIc coMPAivY,"1Nc.,joFNEWlYoRKgrT; Y.," A conroitarioitgorfnniv.

YORK.. 1

riarNTINenEsscYLmnER f l Application filed April .5, 1928*. Serial-No; 2767596.' i

This invention relates; to printing L press cylinders, particularly such'as@ are adapted for carrying a yieldablefblanket and hasifor its object to provide a-cylinder1of-Vvv the class specied on whichan endless blanket may bel assembledreadily and accurately in position. To these endsrny improvementsv comprise features illustratedl in their preferred em' bodiment in thedrawing accompanyingthis specification, wherein 1 Figure l is an end elevation, partly in section, of half of a printing press cylinder embodying my improvements. Figs. 2 and 3 are Y similar views showing successive steps in the operation of assembling a blanket on the cylinder. Fig. 4 is a section on line 4 4 of Fig. 3 and Fig. 5 is a section on line 5-,5 of Fig. 3.

The scale of Figs. l, 2 and 3 is the same.

yThe scale or" Figs. l and 5 is the same but about one and one-hali times larger than that of the earlier figures.

Myimproved device is directed to a solution of that well known problem in the art, to wit: the suitable assembly of a yieldable blanket on theface-of a rigid cylinder and theV bringing of that blanket into taut condition snugly against the periphery of the cylinder. Numerous arrangements more or less successl ful have been devised to this end, and in the particular class to which the present improvements pertain, several types of cylinders having portions of their peripheries retractable Yto permit the assembly of an endless blanket therearound are known. Y

In the present device means are provided not only to move a peripheral portion of the cylinder in and out, but also to locate that peripheral portion in its outer position in con` Vformity with and in completion of the circumferential continuity of the cylinder.

Also abutment means are provided for said peripheral portion, when in its outer position, so that said portion is sustained with security and` accuracy in place and forms a highly reliable circumferential portion of the cylinder.

Directing attention now more particularly to the drawing-cylinder 2 may be of the usual hollow construction comprising a cylindrical shell Bhaving one or more pockets or cavities as .6, with-'c`)p'posite walls?,` .Slthereof parallel with eachother and with the axis ofthe cylinder. Said shell 3 may be providedzwithzthe axial hubs 10?respectively.y

Movable radially within; pocket andj bear:-V

,usual armsQ: in reaching.l fromitsi ends to ing againstVA opposite' walls. 7, 8 thereof for guidance isv block.` 11,.,having :a l curvedxonter face 12 which,.when said bloekis in:i-tsLcuter' position, Fig. .3, conforms. tof .the peripheral contour-oi' theacylinder and formsf-airessene j tial portion of the cylinder. When said blockv 1l is retracted within; the cylinder, Fig.. l,

endless blanket` 13 .mayfbeA slipped read-ily in an axial direction over-.andfontofthe cylinder,

the: direct distancebetween the outer ends of walls- .7, 8 being enough.` lesssthan the length of thecurved-J face of' block :l2 :to afford 'ame ple slackin said blanket.

For moving .block 1l inI andA out' relatively tothe` cylinder the. followingfmeans .are :provided-z On the innerfacel 140i' blockf ll, and preferably nearthe four? corners thereof'.y are iXed threadednutjs `as lkwitlr wh'ichfto en@ gage screws as .146, whose axes-laire normal: `to a plane through theaiiis` of the cylinder. These screws are rotatably mounted' in bear,- ings as 17 Yin. the bod-yofthe cylinder andare restrained against endwi'se movement by collars as 1.8 'on theonehand, engagingfthe under faces of said bearings: and by. sprocketsasllQ engaging the upper faces of saidibearings and: said ysprockets are-.held by nutsas120,all respectively. l l l Encirclingand engaging' saidl sprockets is endless chain 2l, whereby, V when'f'one screw is rotatechasby a-wrenclr applied tcf-nutQO,

all. said screws are rotated in unisonand t0 the` same degree. .By this means bloc'kll may belmoved in' or out between walls?, 8in i parallelism with the'aXis of the cylinder.

Block 11 is providedfat eachside th'ereor" Vwith seats 22,23andithe opposite side wall's 7, 8-'o-f piocket'have abutmentsfli, 251orthe reception between saidseats andi .abut-ments Y respectively, of spacing bars orkeys` 26, 27."

For-"convenience, .said keys are "pre'erab'lv l .les

Y in their inner positions.

as 28 against which said keys are seated when It will be obvious to those skilled in the art, that a single key or spacer may be inserted between the inner wall of pocket 6 and the upper facejlll of block 11 withequal Y e'lect to the two keys 22, 2S for locating'said block in the cylinder. v v Theoperatio'n of my improved device is as follows: Assumingblock llt-o be in its'retracted position, Fig.' l, endless blanket 18 is slipped onto the cylinder. A wrench is then y applied to any one of nuts 21D and all'of screws 16 are thereby rotated, through the, chain connected sprockets 19, in such direction as tocause the outward movementV of block 11. This outward movement of said blockris continued until the curvedtace 12 thereofprotrudes very slightly beyondperipheral contormity with the cylinder. rlhis separates seat 22 and abutment 2A on thev one side and seat 23 and abutment 25 on the Vvother side suliiently to permit the free introduction of keys 26,127 between the respective seats and abutments. .These keys are pushed in until they abutv against stops 28` respectively. Then screws 16 are rotated individually in reverse direction, sufficiently to return block 11 to a position where its curved tace 12 conforms withV the periphery of the cylinder. At the same time keys -26, 27 are tightly gripped between the respective seats and ab-utments thus serving to locate saidblock accurately. i f Y ,y Y

If desired or necessary, before screwsl are rotated individually in reversedirection, chain 21 may be removed from sprockets 19 tov aord freedom of action to said screws. In some cases, if chain 21 is slack, said screws may be operated a sufficient amount individually without removing said chain.

parallelism with the axis of said cylinder,

`opposite seats on said block and opposite abutments on said cylinder and a key insertable between each seat and its respective abutment for locating said block in operative position in said cylinder.

3. Ina device .of the character `described the combination of a cylinder, a movable block therein, said block having a curved face, which in theouterposition of said block conforms to the. `peripheral contour of said cylinder, means for guiding said block in a radial path,4 a key insertable between said block and said cylinder for locating said block in operative position in said cylinder, means for moving said block including a plurality of screws mounted for rotation in said cylinderl andk restrained against endwise movementtherein, each of saidscrews having a sprocket fixed thereon and an endless chain connecting said sprockets whereby said screwsmay be rotated in unison.

In witness whereof, Ihereby aix my signature this 3rd day of April, 1928.

' WILLIAM H."BANZETT.

For removing the endless blanket Jfrom the versed, the keys being first freed in their seats, then withdrawn, and `theblock 11 retracted within the cylinder.

I claim: Y

1. In a device of the character described the combination of a cylinder, a movable block therein, said block having a curved face, which inthe outer position of lsaid block conforms to the peripheral contour of said cylinder, means for guiding said block in a radial path, means for moving said block in parallelism with the axis of said cylinder, and a key insertable between said block and said cylinder for locating said block in operative position in said cylinder. i

2. In a device of the character described the combination of al cylinder, a movable block therein, said block having a curved face, which in the'outer position 'of said block conforms to the peripheral contour of said cylinder, means for guiding said block in a radial path, means for moving said block in 

